Tune up 4 stroke engine

To increase the power or engine power standard commonly called tune up, needs to be put changes to a few things: 1 Improve / increase the compression ratio. 2 Fix the IN and EX ported that fuel revenue to be smooth and good. 3 Change the duration, Lift Noken. 4 Change the ignition (if the race is allowed). 5. change the ratio with Close Ratio. 6 Setting the carburetor.
COMPRESSION Increasing the compression ratio (Compretion Ratio = CR) is a way of beginning to be taken by the mechanics to increase engine power. However, to increase the compression ratio to consider several factors, among others: 1 The fuel used. 2nd Quality used piston. How to increase COMPRESSION: 1 Replace the piston with racing models. 2 Bringing the deck clearance. 3 lathe Head. 4 Weld Head. 5. lathe Block and Piston. HOW TO LOWER COMPRESSION: 1 reamer dome on the head. 2 Deepening valve on the piston grooves. 3 lathe piston. ADVANTAGES OF USING HIGH COMPRESSION: 1. increased engine power. 2 Final gear becomes heavy. 3 Power engine feels from the bottom up lap. LOSS USING HIGH COMPRESSION: 1. machine becomes hot quickly. 2 Engine break into large and coarse. 3 If the calculation is not precise compression, frequent detonation. To find out / calculate the compression ratio (CR) of the engine, we first need to know the volume of a cylinder that will be done. EXAMPLES IN MACHINE JUPITER Z O / S 100 Or D Bore: 52 mm = 5.2 cm Stroke 54 mm = 5.4 cm = 0.785 x 5.22 x 5.42 = 114.62 cc ≍ 115 cc EXAMPLE OF JUPITER Z O / S 100 The volume of the combustion chamber through the spark plug is measured with a burette is 14.55 c So the combustion chamber volume 14.55 cc - 0.7 cc = 13.85 (0.7 cc is a volume of space Busi) How to determine the contents of the combustion chamber cc how we should wear the compression ratio that we have set. For example, we want a compression ratio of 1: 14, what is the volume space fuel? Means that if we want a compression ratio of 1: 14, the contents of the combustion chamber must 8,84cc. Porting The purpose of the change is the porting effort to enhance or improve volumetric efficiency by optimizing the flow of gas into the combustion chamber. There are 3 factors that determine the amount of power on a machine: 1 The efficiency of the engine ie how push on the piston rotation force generated by the fly wheel. 2 The efficiency of thermal (heat) ie how much fuel to be burned / heated in the cylinder to push the piston down to BDC efficiently. 3 Volumetric Efficiency ie making the channel / right size for optimal gas pump. Various kinds Porting Form In a modification, Head, try not to get any obstacles, such as holes on the intake manifold holes must also be equal to the joint / rubber manifold, keep in Rimer activities so that no space is angled. Noken Among the components on the main motor to increase the speed of the engine is modified camshaft / cam / Noken. Noken controls the open / close valve is required to regulate the fuel passing through the valve in the valve ex and throw passes in harmony. HOW Noken AS FOLLOWS: 1 If the point A touch trigger, the valve began to open up and will be full after a protrusion (point B). 2 After passing the peak, the valve back down and closed the meeting after point C. 3 From A then up to C and then back to B is called duration Noken. 4 High Lift determine bulge Max. 5. bulge profile shape of the surface determines the acceleration of the closing and opening of the valve by the shape of the surface bulge profile. LIFT MAX How to determine the motor racing Max Lift: In theory for standard motor, Lift Max is 23% of the diameter of the valve. Then for the motor racing circuit is not very long, about 29% Max Lift - 31% of the diameter of the valve. For circuit racing with long, Max Lift can be studied up to 35% of the diameter of the valve. Motorcycle How to calculate the duration of several ways: 1 Duration is calculated as 1.27 mm valve lift valve on 0 (zerro). 2 Duration is calculated at the time the valve starts to open the valve on the 0.10 mm. To facilitate the making, we will use the second way. Before we want to determine the length of numbers, we must first know how the LC (lobe center) on the camshaft as we will modify. To determine the LC, we must put on the camshaft as the engine and measure with a protractor mounted on the crankshaft to the left / magnet. For example: LC JUPITER Z: 103 We want the duration of 310 degrees. How many degrees in an open and how many degrees in close? Calculation To Finding in close: 310 - 180 - 52 = 78 MEANS FOR LC 103 IF WE WANT IS THE DURATION OF 301 NUMBERS duration: IN OPEN BEFORE 52 TMA CLOSE IN 78 AFTER TMB For the duration of motor racing is ideally 29-33. Max lift for duration of motor racing is ideally: 7.5 mm - 8.3 mm The advantage of using a high lift and duration of: * Engine power becomes very large * The machine is very good on lap top The disadvantage of using a high lift and duration of: * On lap down is not good * As the valve becomes not durable * Valves are floating / hovering if the valve is not strong pear * Holes the valve on the piston must be in the HOW hone CAM * The Base Circle digrinda approximately 18 to meet the desired lift * This was followed by grinding the ram to determine the duration * Hone the flank lift to determine O / L and form a profile * Keep in grinding a flat and smooth kem to keep the rocker arm remain durable and reduces floating. IGNITION / IGNITION Part of the machine works to burn a mixture of fuel and air is compressed by the piston in, before the piston reaches TDC. Source of electric current to generate a stepping flame can be derived from the spool or langrung battery. Sources of electricity generated directly from the bobbin is often called AC ignition, and directly from the battery often called ignition DC. Ignition AC The advantages of using air-conditioning system: * The electrical system immediately according to engine speed. * No need to use batteries The disadvantage of using air conditioning system: * Round the machine slightly reduced, because the magnetic force that is Ignition DC The advantages of using the system DC / Total Lost: * No need to use a magnet * Weight of the rotor can be made according to our wishes (be very light) The disadvantage of using the system DC / Total Lost: * Must frequent recharging (recharging) the battery (batteries) * Risk of battery overdrawn Standard ignition timing differences and are often used for racing: Ignition for standard motor * At low RPM (1000-3000 RPM): stepping fire at 8-15 before TDC * In the middle of high RPM (4,000 to top): stepping fire at 25-30 before TDC * Fire sparkplug racing ignition is not greater than Ignition for motor racing * At low RPM (1000-3000 RPM): stepping fire at 20-30 before TDC * In the middle to high RPM (4,000 and above): stepping fire at 35-42 before TDC * Fire big spark Miscellaneous types of CDI 1 single folder cdi which comprises only 1 folder / Swing example: congenital motor cdi, brt cdi dual band 2 multi-folder cdi which consists of more than 1map / Swing that we can choose its own with a few clicks. example: Rextor adjustable cdi, cdi brt smart click 3 programable cdi cdi adjustable curve / graphics ignition according to our desires, which is adapted to the character of the engine is needed. example: Rextor programmable, Vortec cdi, brt cdi remmote.